Last week, a Taiwanese website posted some new Left 4 Dead 2 posters, adding them to the existing Dark Carnival (shown here), Swamp Fever, and The Parish "ads." There haven't been any details revealed, but now we can speculate what "Dead Center" and "Hard Rain" are about.
The site only talks about Left 4 Dead 2 -- roughly "Evil Spiritual Force 2" in Chinese -- in a general sense, with no new gameplay or anything mentioned. Anyway, here are the new posters, along with some previously released (above). Click for larger view:
Valve recently announced Scavenger Mode for L4D2, in which Survivors must look for fuel to power a generator before they're killed or time runs out. The Infected can hinder their progress by destroying the much-needed gas cans instead.